要求一篇英语作文,题材,假如你是李明,王老师上星期一布置一篇论文,要求这个星期五交,而你没有按时...

dear teacher:
i am liming.i am sorry i can't finish my compition.because my grandmother fell in ill this week,and i have to look after my grandmother.so i haven't enough time to finish my compition.i'm very sorry.i will finish it on the next monday.
liming